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X-ray absorption spectroscopy using a self-seeded soft X-ray free-electron laser.

  • Author(s): Kroll, Thomas
  • Kern, Jan
  • Kubin, Markus
  • Ratner, Daniel
  • Gul, Sheraz
  • Fuller, Franklin D
  • Löchel, Heike
  • Krzywinski, Jacek
  • Lutman, Alberto
  • Ding, Yuantao
  • Dakovski, Georgi L
  • Moeller, Stefan
  • Turner, Joshua J
  • Alonso-Mori, Roberto
  • Nordlund, Dennis L
  • Rehanek, Jens
  • Weniger, Christian
  • Firsov, Alexander
  • Brzhezinskaya, Maria
  • Chatterjee, Ruchira
  • Lassalle-Kaiser, Benedikt
  • Sierra, Raymond G
  • Laksmono, Hartawan
  • Hill, Ethan
  • Borovik, Andrew
  • Erko, Alexei
  • Föhlisch, Alexander
  • Mitzner, Rolf
  • Yachandra, Vittal K
  • Yano, Junko
  • Wernet, Philippe
  • Bergmann, Uwe
  • et al.

Published Web Location

https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-24-20-22469&id=350231
No data is associated with this publication.
Abstract

X-ray free electron lasers (XFELs) enable unprecedented new ways to study the electronic structure and dynamics of transition metal systems. L-edge absorption spectroscopy is a powerful technique for such studies and the feasibility of this method at XFELs for solutions and solids has been demonstrated. However, the required x-ray bandwidth is an order of magnitude narrower than that of self-amplified spontaneous emission (SASE), and additional monochromatization is needed. Here we compare L-edge x-ray absorption spectroscopy (XAS) of a prototypical transition metal system based on monochromatizing the SASE radiation of the linac coherent light source (LCLS) with a new technique based on self-seeding of LCLS. We demonstrate how L-edge XAS can be performed using the self-seeding scheme without the need of an additional beam line monochromator. We show how the spectral shape and pulse energy depend on the undulator setup and how this affects the x-ray spectroscopy measurements.

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